content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import io.reactivex.observable.*;
  import io.reactivex.observable.extensions.HasUpstreamObservableSource;
  
  /**
   * Base class for operators with a source consumable.
   *
   * @param <T> the input source type
   * @param <U> the output type
   */
  public abstract class AbstractObservableWithUpstream<T, U> extends Observable<U> implements HasUpstreamObservableSource<T> {
  
      /** The source consumable Observable. */
      protected final ObservableSource<T> source;
  
      /**
       * Constructs the ObservableSource with the given consumable.
       * @param source the consumable Observable
       */
      public AbstractObservableWithUpstream(ObservableSource<T> source) {
          this.source = source;
      }
  
      @Override
      public final ObservableSource<T> source() {
          return source;
      }
  
  }
  